Abstract
The synthesis and in vitro anti-tumor 60 cell lines screen of a novel series of anthracenyl isoxazole amides (AIMs) (While not a strict acronym, the designation AIM is in honor of the memory of Professor Albert I. Meyers.) (22-33) are described. The molecules consist of an isoxazole that pre-organizes a planar aromatic moiety and a simple amide and/or lexitropsin-oligopeptide. The new conjugate molecules were prepared via doubly activated amidation modification of Weinreb's amide formation technique, using SmCl3 as an activating agent which produces improved yields for sterically hindered 3-aryl-4-isoxazolecarboxylic esters. The results of the National Cancer Institute's (NCI) 60 cell line screening assay show a distinct structure activity relationship (SAR), wherein a trend of the highest activity for molecules with one N-methylpyrrole peptide. Evidence consistent with a mechanism of action via the interaction of these compounds with G-quadruplex (G4) DNA and a structural based rational for the observed selectivity of the AIMs for G4 over B-DNA is presented.
| Original language | English |
|---|---|
| Pages (from-to) | 1671-1680 |
| Number of pages | 10 |
| Journal | Bioorganic and Medicinal Chemistry |
| Volume | 17 |
| Issue number | 4 |
| DOIs | |
| State | Published - Feb 15 2009 |
Funding
N.R.N. thanks the National Institute of Neurological Disease and Stroke for Grant NS38444 and P20RR015583. We would like to thank the University of Idaho Research Council, and the National Cancer Institute for financial support. Dr. Dan Zaharevitz assisted us with the COMPARE calculation and interpretation. X.H., C.L. and K.C.R., acknowledge the Malcolm and Carol Renfrew Scholarship Endowment, University of Idaho. C.L. and K.C.R. also thank P20RR16454.
| Funder number |
|---|
| P20RR015583, NS38444 |
| P20RR016454 |
Keywords
- Anthracene
- Anti-tumor
- G-quadruplex
- Isoxazole
- Pyrrole